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Audrey Lynn Mine (Audrey Lynne Mine; Jumping Joe claims), Little Cahuilla Mountain, Cahuilla District, Riverside Co., California, USAi
Regional Level Types
Audrey Lynn Mine (Audrey Lynne Mine; Jumping Joe claims)Mine
Little Cahuilla MountainMountain
Cahuilla DistrictMining District
Riverside Co.County
CaliforniaState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84):
33° 37' 2'' North , 116° 48' 39'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Anza3,014 (2011)14.5km
Idyllwild3,583 (2010)16.1km
Idyllwild-Pine Cove3,874 (2011)16.1km
Valle Vista14,578 (2011)16.4km
East Hemet17,418 (2011)18.0km


MRDS database stated accuracy for this location is 10 meters.

Local rocks include Mesozoic granitic rocks , unit 2 (Peninsular Ranges).

Setting:
The Audrey Lynn Mine is located in the NW¼SE¼ sec. 30, T6S, R2E, SBM, 1.2 km (0.7 mile) N of Little Cahuilla Mountain and just E of the prominent 4,600 ft. mountain top and adjacent to the roadway, about 11.2 km NNW of Cahuilla (town), on National Forest land (located claims). Fine blue to blue-green beryl, quartz crystals, schorl tourmaline, and almandine garnet has been produced from minor underground exploration within the NW striking, SW dipping pegmatite, averaging 15 feet in thickness. Discovery of a large 50 foot long gem-bearing pocket encountered during road maintenance produced several kilos of fine blue-green beryl (aquamarine), and several pounds of large smoky quartz crystals (NE/4 Section 30, T6S, R2E, SBM). Several pegmatite ledges outcrop above and below the primary pegmatite dike exploited near the road cut, most of which have produced minor amounts of gem-quality minerals and show good potential for future discoveries of commercial significance. (San Diego Mining Co. 1998; Osborn 2006)

History:
In 1929, discovery gem-bearing pegmatites producing radio-grade quartz crystals and blue to blue-green beryl (aquamarine), led to the location of the Beryl Crystal and Silica Beryl mining claims known as the Schindler group (Sections 29, 30, T6S, R2E, SBM). The exact location of specific workings is unknown, but many old "pits" and a small adit have been found within the Audrey Lynn mine area, and are generally attributed to Schindler's work, and fit the timeline regarding weathering effects and likely tools utilized or mining methodology (see Schindler group of unpatented lode mining claims).

The first recorded gem discovery on the north side of Little Cahuilla Mountain was made in 1953 during construction of a road connecting to Red Mountain (east). Drilling and rock blasting was necessary to create much of the roadway, and one round of blasting northwest of Little Cahuilla Mountain opened a large pocket of quartz and aquamarine that was eventually called the "Hilton" because of its proportions after excavation.

During the period of 1954 to 1992, the area was relocated as the Jumping Joe mining claims, with sporadic surface development work and minor road improvements made by the claimants at several locations.

In March of 1992, a new discovery of aquamarine north of the roadway and west of the Hilton pocket was made by Phil Osborn of nearby Hemet, whom subsequently staked a mining claim to the lode, naming it after his daughter Audrey Lynn (Osborn). Osborn excavated a series of several small pockets, assisted by Larry Houg during the summer of 1992. (see Beryl v. Aquamarine (DT); repaired crystal measuring 48x12x10mm)

In 1993 another find was made while digging along the southern edge of the forest development road cut after mechanized grading had exposed a section of pegmatite south of the original Osborn discovery. Minor work with hand tools began to produce several small quartz crystals from a thin iron-stained clay seam exposed in the dike near the footwall. Work continued to expose the pocket zone, the dimensions of which ultimately measured up to 12 feet across by approximately 50 feet in length down dip; primarily characterized by the more common pocket minerals such as schorl, albite (var: cleavelandite), microcline, quartz and muscovite. Additionally, several kilos of bright red spessartine were recovered as single gem nodules and some well formed crystals, including matrix associations with quartz and albite. Work removing the pocket contents was performed by Osborn with the assistance of Otto Komarek and Byron Weege of nearby Pala; involving hand work consisting of minor drilling, blasting, rockbar scaling, hammer, chisel and bucket mucking methods.

This extremely large pocket produced many fine gem-quality bluish green to pale greenish yellow beryl crystals, the largest measuring approximately 3/4 inches wide by 4 inches tall. The largest quartz crystal removed was described as bright grayish to brownish yellow in color (var: citrine), near flawless in clarity (water clear or optical-grade), measuring approximately 14 x 14 inches, having hexagonal form, and weighing approximately 96 lbs. The quartz was sold to a rockshop in Beaumont, CA, and was said to have the potential of being cut into a superior quality 10 inch sphere or crystal ball. Many fine mineral examples were also acquired by William F. Larson, some of which are displayed at the Collector in Fallbrook, CA.

In 1994, Otto Komarek discovered another pocket exposed on the NE side of the claim (bottom of canyon) which produced many fine almandine crystals, the largest being described as approximately "walnut-sized". The dimensions of this pocket upon extraction measured approximately 10 x 10 feet, and was referred to as the "Garnet Pit". In 1996, several light grayish to greenish brown ferro-axinite crystals measuring up to 20mm tall, some with small dark orangey reddish black tourmalines and minor feldspar (albite); were discovered during additional prospecting of the northeast mine area. Hand tool work produced several deep brownish red garnet crystals of equant form and good clarity, measuring up to 20mm. Many black tourmaline crystals with slightly etched cat's eye basal pyramid terminations were discovered, measuring nearly 10cm tall, some combined with several deep orangey red almandine crystals studded across the side.

Analytical studies performed on some of these tourmaline crystals show a series between dravite and schorl: dravite (Cal Graeber of Fallbrook, CA; report to Osborn; laboratory results; hair-like dravite needles on schorl). Additionally, the largest cassiterite discovered weighed approximately 12 lbs (single crystal shattered to pieces), while a whole or fully formed crystal specimen was acquired by Cal Graeber and later sold to Dr. Rob Lavinsky, the specimen weighing approximately 9 lbs and associated with minor albite and overlaying schorl; measuring approximately 12.4x9.1x7cm. This specimen is said to be the largest single cassiterite crystal from California in existence.

In 2001 additional prospecting just NE of the large road pocket produced several small light grayish greenish blue beryl crystals up to 18mm tall. In February of 2006, a new zone of mineralization was discovered which to date has produced several pounds of schorl, quartz, and feldspar group minerals. One of the largest schorl crystals recovered stands over 8 inches tall, and some tabular quartz crystals have been found measuring up to 12 inches or more in length.

Regions containing this locality

Pacific OceanOcean
Pacific PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


16 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Albite var: Cleavelandite
Formula: Na(AlSi3O8)
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
'Almandine-Spessartine Series'
Reference: Osborn, P. 2006. Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Axinite-(Fe)
Formula: Ca2Fe2+Al2BSi4O15OH
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
'Axinite Group'
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Beryl
Formula: Be3Al2(Si6O18)
Reference: Sampson, R. J., Tucker, W. B. 1945. Mineral Resources of Riverside County; California Division of Mines & Geology, 41 (3); p. 165.
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Beryl var: Goshenite
Formula: Be3Al2(Si6O18)
Reference: Osborn, P. 2006. Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Cassiterite
Formula: SnO2
Description: 4 kg crystal found in 1992
Reference: Osborn, P. 2006. Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.; Jesse Fisher (2011) Mines and Minerals of the Southern California Pegmatite Province. Rocks & Minerals 86:14-34.
'Clays'
Reference: Osborn, P. 2006. Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
'Columbite-(Fe)-Columbite-(Mn) Series'
Reference: Fisher, J. 2002. Gem and rare-element pegmatites of southern California: The Mineralogical Record bi-monthly magazine, Vol. 33: p. 369. Mineralogical Record Inc., Tucson, AZ.
Dravite ?
Formula: Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
'Dravite-Schorl Series' ?
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
'Feldspar Group'
Reference: Fisher, J. 2002. Gem and rare-element pegmatites of southern California: The Mineralogical Record bi-monthly magazine, Vol. 33: p. 369. Mineralogical Record Inc., Tucson, AZ.
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Ilmenite
Formula: Fe2+TiO3
Reference: Phillip Ward specimen, confirmed by Raman (University of Arizona)
'Mica Group'
Reference: Osborn, P. 2006. Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Microcline
Formula: K(AlSi3O8)
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Monazite-(Ce)
Formula: Ce(PO4)
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Orthoclase
Formula: K(AlSi3O8)
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Quartz
Formula: SiO2
Reference: Sampson, R. J., Tucker, W. B. 1945. Mineral Resources of Riverside County; California Division of Mines & Geology, 41 (3); p. 165.
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.; Jesse Fisher (2011) Mines and Minerals of the Southern California Pegmatite Province. Rocks & Minerals 86:14-34.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Fisher, J. 2002. Gem and rare-element pegmatites of southern California: The Mineralogical Record bi-monthly magazine, Vol. 33: p. 369. Mineralogical Record Inc., Tucson, AZ.; Jesse Fisher (2011) Mines and Minerals of the Southern California Pegmatite Province. Rocks & Minerals 86:14-34.
Spessartine
Formula: Mn2+3Al2(SiO4)3
Reference: Fisher, J. 2002. Gem and rare-element pegmatites of southern California: The Mineralogical Record bi-monthly magazine, Vol. 33: p. 369. Mineralogical Record Inc., Tucson, AZ.
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Xenotime-(Y)
Formula: Y(PO4)
Reference: Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Cassiterite4.DB.05SnO2
Ilmenite4.CB.05Fe2+TiO3
Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Monazite-(Ce)8.AD.50Ce(PO4)
Xenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
var: Cleavelandite9.FA.35Na(AlSi3O8)
Almandine9.AD.25Fe2+3Al2(SiO4)3
Axinite-(Fe)9.BD.20Ca2Fe2+Al2BSi4O15OH
Beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
var: Goshenite9.CJ.05Be3Al2(Si6O18)
Dravite ?9.CK.05Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Orthoclase9.FA.30K(AlSi3O8)
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Unclassified Minerals, Rocks, etc.
'Almandine-Spessartine Series'-
'Axinite Group'-
'Clays'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Dravite-Schorl Series' ?-
'Feldspar Group'-
'Garnet Group'-X3Z2(SiO4)3
'Mica Group'-
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Cassiterite4.4.1.5SnO2
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
AXO4
Monazite-(Ce)38.4.3.1Ce(PO4)
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Spessartine51.4.3a.3Mn2+3Al2(SiO4)3
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination
Axinite-(Fe)56.2.2.1Ca2Fe2+Al2BSi4O15OH
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Six-Membered Rings with borate groups
Dravite ?61.3.1.9Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Orthoclase76.1.1.1K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
Albite
var: Cleavelandite
-Na(AlSi3O8)
'Almandine-Spessartine Series'-
'Axinite Group'-
Beryl
var: Aquamarine
-Be3Al2Si6O18
var: Goshenite-Be3Al2(Si6O18)
'Clays'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Dravite-Schorl Series' ?-
'Feldspar Group'-
'Garnet Group'-X3Z2(SiO4)3
'Mica Group'-
Quartz
var: Smoky Quartz
-SiO2
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z
Xenotime-(Y)-Y(PO4)

List of minerals for each chemical element

HHydrogen
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
H MuscoviteKAl2(AlSi3O10)(OH)2
H DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
BeBeryllium
Be BerylBe3Al2(Si6O18)
Be Beryl (var: Aquamarine)Be3Al2Si6O18
Be Beryl (var: Goshenite)Be3Al2(Si6O18)
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
B Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
B DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
O CassiteriteSnO2
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O AlmandineFe32+Al2(SiO4)3
O SpessartineMn32+Al2(SiO4)3
O Garnet GroupX3Z2(SiO4)3
O Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
O FluorapatiteCa5(PO4)3F
O Monazite-(Ce)Ce(PO4)
O Xenotime-(Y)Y(PO4)
O Quartz (var: Smoky Quartz)SiO2
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
O Albite (var: Cleavelandite)Na(AlSi3O8)
O AlbiteNa(AlSi3O8)
O MicroclineK(AlSi3O8)
O OrthoclaseK(AlSi3O8)
O BerylBe3Al2(Si6O18)
O Beryl (var: Aquamarine)Be3Al2Si6O18
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O Beryl (var: Goshenite)Be3Al2(Si6O18)
O IlmeniteFe2+TiO3
O DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
FFluorine
F FluorapatiteCa5(PO4)3F
NaSodium
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Albite (var: Cleavelandite)Na(AlSi3O8)
Na AlbiteNa(AlSi3O8)
Na DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mg DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al AlmandineFe32+Al2(SiO4)3
Al SpessartineMn32+Al2(SiO4)3
Al Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Albite (var: Cleavelandite)Na(AlSi3O8)
Al AlbiteNa(AlSi3O8)
Al MicroclineK(AlSi3O8)
Al OrthoclaseK(AlSi3O8)
Al BerylBe3Al2(Si6O18)
Al Beryl (var: Aquamarine)Be3Al2Si6O18
Al Beryl (var: Goshenite)Be3Al2(Si6O18)
Al DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
SiSilicon
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si AlmandineFe32+Al2(SiO4)3
Si SpessartineMn32+Al2(SiO4)3
Si Garnet GroupX3Z2(SiO4)3
Si Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Si Quartz (var: Smoky Quartz)SiO2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si Albite (var: Cleavelandite)Na(AlSi3O8)
Si AlbiteNa(AlSi3O8)
Si MicroclineK(AlSi3O8)
Si OrthoclaseK(AlSi3O8)
Si BerylBe3Al2(Si6O18)
Si Beryl (var: Aquamarine)Be3Al2Si6O18
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
Si Beryl (var: Goshenite)Be3Al2(Si6O18)
Si DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
PPhosphorus
P FluorapatiteCa5(PO4)3F
P Monazite-(Ce)Ce(PO4)
P Xenotime-(Y)Y(PO4)
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K MicroclineK(AlSi3O8)
K OrthoclaseK(AlSi3O8)
CaCalcium
Ca Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Ca FluorapatiteCa5(PO4)3F
TiTitanium
Ti IlmeniteFe2+TiO3
MnManganese
Mn SpessartineMn32+Al2(SiO4)3
FeIron
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe AlmandineFe32+Al2(SiO4)3
Fe Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Fe IlmeniteFe2+TiO3
YYttrium
Y Xenotime-(Y)Y(PO4)
SnTin
Sn CassiteriteSnO2
CeCerium
Ce Monazite-(Ce)Ce(PO4)

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Cretaceous
66 - 145 Ma



ID: 3186295
Mesozoic intrusive rocks

Age: Cretaceous (66 - 145 Ma)

Lithology: Intrusive igneous rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Late Cretaceous - Middle Jurassic
66 - 174.1 Ma



ID: 2940915
Mesozoic granitic rocks, unit 2 (Peninsular Ranges)

Age: Mesozoic (66 - 174.1 Ma)

Stratigraphic Name: Bonsall Tonalite; Bradley Granodiorite; Cactus Quartz Monzonite; Cajalco Quartz Monzonite; Corona Hornblende Granodiorite Porphyry; Domenigoni Valley Granodiorite; Escondido Creek Leucogranodiorite; Estelle Tonalite; Fargo Canyon Diorite; Green Valley Tonalite; Home Gardens Quartz Monzonite Porphyry; Indian Mountain Leucogranodiorite; Lakeview Mountain Tonalite; Lake Wolford Leucogranodiorite; La Sierra Tonalite; Mount Hole Granodiorite; Rattlesnake Granite; Roblar Leucogranite; San Jacinto Granodiorite; Stonewall Quartz Diorite; Woodson Mountain Granodiorite

Description: Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite

Comments: Peninsular Ranges. Primarily tonalite, granodiorite, and minor quartz monzonite and granite. Emplacement ages mostly 80 to 105 Ma in eastern part of area and 105 to 140 Ma in western part; minor Jurassic rocks in central part Original map source: Saucedo, G.J., Bedford, D.R., Raines, G.L., Miller, R.J., and Wentworth, C.M., 2000, GIS Data for the Geologic Map of California, California Department of Conservation, Division of Mines and Geology, CD-ROM 2000-07, scale 1:750,000.

Lithology: Major:{tonalite}, Minor:{quartz diorite,granodiorite,quartz monzonite}, Incidental:{granite, pegmatite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Sampson, R. J., Tucker, W. B. (1945), Mineral Resources of Riverside County; California Division of Mines & Geology: 41(3): 165.
Saul, R. B. et al. (1970), pp. 242-244, 246-249, 253-255, 263-264.
Gochenour, K. (1988), Black Tourmaline from Little Cahuilla Mountain, Riverside County, California. Rocks and Minerals: 63(6): 440-444.
Austin, G. T. (1993), Gemstones, 1992; U.S. Department of the Interior, Bureau of Mines: 29 pp.; Directory of Principal Gem Stone Producers in the United States, Summary Supplement, Mineral Industry Surveys, USDI, Bureau of Mines (Audrey Lynne (sic) as reported by Osborne (sic), P.).
U.S. Bureau of Mines (1995), Minerals Availability System/Mineral Industry Location System (MAS/MILS): file #0060651366.
Cordova, E. M. (1995), Audrey Lynn mine field analysis; inspection of the Osborn workings, and valuable mineral discovery (Personal communication to Scott L. Ritchie, SDMC, Nov.)
San Diego Mining Company (1998), Cordova, E. M., Ritchie, S. L., Polk, M. T.; Audrey Lynn mine field analysis, Jan.
Fisher, J. (2002), Gem and rare-element pegmatites of southern California: The Mineralogical Record: 33: 369. Mineralogical Record Inc., Tucson, Arizona.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10164240.
Osborn, P. (2006), Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
Fisher, Jesse (2011) Mines and Minerals of the Southern California Pegmatite Province. Rocks & Minerals: 86: 14-34.
Hamilton, M. M., Rains, R., and Federspiel, F., in preparation (published now ?); Abandoned and Inactive Mines and Prospects of the San Bernardino National Forest.

USGS MRDS Record:10164240
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